English book · God Arises

NATURE AND SCIENCE SPEAK ABOUT GOD

English book, PDF p. 108

By Maulana Wahiduddin Khan

Nature and Science Speak about God ~ 108 ~ the quantitative relations between heat and other forms of energy. The importance of conservation in relation to energy is expressed in the first law of thermodynamics. The law of Entropy is the second law of thermodynamics. To understand it, let us take the example of a metallic bar, which has been heated at one end but left cold at the other. Heat will instantly begin to flow from the hot end along the length of the bar to the cold end, and will continue to do so until the temperature of the whole bar becomes uniform. The flow of heat will always be in one direction, i.e. from warmer to colder bodies and this flow will never pass spontaneously in the opposite direction, or even haphazardly in just any direction. Other examples of such uniform and non-reversible processes abound in the physical world. For instance, gas always flows towards a vacuum or moves from a point of higher pressure towards that of a lower pressure till its pressure becomes uniform. It is impossible for any gas to flow in the reverse direction. Such observations provide the basis for the second law of thermodynamics. This law may be stated as follows.

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